Oiling device



July 16, 1940. I A 2,207,935

OILING DEVICE Filed Nov. 19, 1958 INVENTOR Julius Naab.

HIS ATTORNEY Patented July 16, 1940 OILIN G DEVICE Julius Naab, Easton, Pa., assignor to Ingersoll- Rand Company, Jersey City, N. J., a corporation of New Jersey Application November 19, 1938, Serial No. 241,296

4 Claims.

This invention relates to oiling devices, and more particularly to an oiling device for the crosshead and associated. elements of a reciprocatory compressor and similar machines.

One object of the invention is to assure a constant supply of oil to all the bearing portions of the crosshead.

Another object is to assure an immediate and ample supply of oil to the crosshead bearings at the beginning of each period of operation of the machine embodying the crosshead.

Other objects will be in part obvious and in part pointed out hereinafter.

In the drawing accompanying this specification and in which similar reference numerals refer to similar parts,

Figure 1 is a longitudinal elevation, partly broken away, of a compressor equipped withan oiling device constructed in accordance with the practice of the invention,

Figure 2 is a transverse view taken through designates a main frame of a compressor and 2! a cylinder which may contain a suitable piston and valves (not shown) for respectively compressing fluid and valving it to and from the cylinderl The positions of the valves are indicated by valve covers 22 on the surface of the cylinder 2!, and the fiuid'to be compressed is conveyed to the cylinder by a conduit 23 and, after being c0m pressedyis discharged through a pipe 24.

The compressor illustrated is of the conventlonal reciprocatory type comprising a crank shaft 25 which carries a fly wheel 26 and has a crank pin 21 extending through a bearing portion in an end of a connecting rod 28. The crank shaft is provided with counterweights 29 on the crank webs 30, and on the counterweights 29 are splashers or scoops 3| to lift oil 32 from the lowerportion of the main frame and splash such oil throughout the interior of the casing for lubricating, among other elements, the bearings (not shown) for the crank shaft 25 and the connecting rod.

The opposite end of the connecting rod 23 is arranged pivotally upon a pin 33 that extends transversely through a crosshead 34 connected, in any well known manner, to the compressor piston by a rod 35. On the lower side of the crosshead 34 is a base or foot piece 36 having a wearing gib 31'; both being slidable in a guideway 38 defined by a pedestal, in the main frame, and bars 39 secured to the pedestal by bolts, 43 and partly overlying the foot piece 36.

The pin 33 has a pair of spaced tapered peripheral surfaces 4| and 42 for frictionalengagement with correspondingly shaped bores 43 and 44 in the portions of the crosshead 34 lying on opposite sides of the connecting rod 28. The pin 33 is hollow having a chamber 45 forming a reservoir for oil, and in the wall of the pin 33 are radial passages 46 for conveying oil from the chamber 45 to the cooperating surfaces'of the pin 33 and the connecting rod 28. I v In accordance with the practice of the invention the chamber 45 extends entirely through the pin 33 and at the opposite ends of the pin 33 are containers 41 and 48 which are preferably secured to the pin 33, as by screws 49 extending through the containers and threaded into the ends of the pin. The containers are so'iposi-t tioned that they overlie the bars 39, and in the bars 39 are longitudinally extending grooves 53 from which lead passages 5| through the bars 39, the foot piece 36 and the gib 31 for conveying oil to the cooperating surfaces of the guideway 38 and the parts reciprocable therein.

The containers 4! and 48 each serve as reservoirs for oil. They difier principally in that the container 48 serves as the receiver to receive oil from supply and is accordingly provided in its upper surface with an elongated opening 52 through whichoil enters. the interior or chamber 53 of the container 48. The opening 52 is positioned directly beneath the outlet opening 54 of a pipe 55 in the main frame 26 and is of such length that a portion thereof will at all times lie in the vertical plane of the outlet opening 54 in the various positions to which the container 38 will be moved during the reciprocations of the crosshead 34.

The oil that flows through the pipe 55, and thus to the chamber 53, may be supplied thereto in any well known manner but in the present instance is accumulated in a trough 56 in the main frame to which it is delivered by the scoop 3|. The pipe 55 is attached fixedly to the trough 56 so that the oil will flow directly from the trough into the pipe.

The chamber 53 of the container 48 is in constant communication with the chamber 45 and in the container48 is a vertical wall 57 that c0- operates with an endwall 58 and the side walls of the container to define a passage 59 through which oil may flow into the groove 56 beneath the container 48. Preferably an inclined baffle portion 60, partly overlying the chamber 53, is formed on the upper end of the wall 51 to avoid a too free splashing of oil from the chamber 53 toward the passage 59 during the reciprocations of the crosshead. A bafiie 6|, also inclined, is arranged in an intermediate portion of the op posite side of the chamber 53 to assist in retaining the oil in the chamber 53.

The container 41, which is of less height than the container 48, is also provided with an internal upright wall 62 to divide the interior of the container into a chamber 63 and a passageway 64. The chamber 63 opens into the chamber 45 in the pin 33 and a portion of the oil flowing into the chamber 63 passes or is splashed over the top of the wall 62 into the passage 64, whence it flows into the groove 50 beneath the container 4'! for supplying oil through the associated pas sage 5| to the guideway 38.

The wall 62 is of less height than the wall 5'! in the container 48 and has an inclined baflie portion 65 overlying the adjacent portion of the chamber 63 to prevent a too free expulsion of oil from said chamber during the reciprocations of the crosshead,

In practice, oil scooped up by the splasher 3| and hurled against the top of the main frame will fiow into the trough .55 thence through the pipe and the inlet opening 52 into the chamber 53 or the passage 59 accordingly as the chamber or the passage are moved beneath the outlet opening 54 of the pipe. The oil flowing directly into the passage 59 will pass into the underlying groove 50 and flow through the associated passage 5! into the guideway 38.

The oil entering the chamber 53 flows into the chamber 45 and a portion of this oil will pass through the passages 46 to lubricate the peripheral surface of the pin 33. The chamber 63, being in direct communication with the chamber 45, will also be filled with oil and, owing to the movement of the crosshead, some of the oil will be dashed out of the chamber 63 over the wall 62 into the passage 64, whence it will flow into the underlying groove 50 and pass through the passage 5! into the guideway 38.

The reciprocatory movement of the crosshead will also cause oil to be splashed from the chamber 53 over the wall 51 into the adjacent passage 59 so that a plentiful supply of oil will be assured to the guideway.

Inasmuch as the level of the oil in the chambers 53 and 63 will be maintained at a level above the passages 46 these passages will be at all times full of oil both during the operating and idle periods of the compressor. This is particularly desirable since it assures thorough lubrication of the bearing surfaces of the crosshead, the connecting rod and the wrist pin at the beginning of each period of operation.

I claim:

1. In a device of the character described, a casing, a crosshead in the casing, a rod, a guide for the crosshead, a pin in the crosshead forming a bearing for the rod and having a passage leading to the cooperating surfaces of the pin and the rod, a stationary oil-conveying conduit in the casing, a container on the pinhaving a chamber for oil communicating with the passage and having a passage for delivering oil to the guide, and means on the container forming an elongated inlet opening. for the chamber to receive oil from the conduit in difierent operative positions of the crosshead.

2. In a device of the character described, a casing, a crosshead in the casing, a guide for the crosshead, a rod, a pin inthe cross head and the rod having a passage for oil, a stationary oilconveying conduit in the casing, a container reciprocable with the crosshead having a chamber in constant communication with the passage and having an elongated inlet opening to receive oil from the conduit in different operative positions of the crosshead, and means in the container defining a passage for delivering oil to the guide.

3. In apparatus of the character described, a casing, a crosshead in the casing, a guide for the crosshead, a pin in the crosshead having ,a passage for oil, a stationary oil-conveying conduit in the casing, containers on the opposite sides of the crosshead having chambers in 0011111111111? cation with the ends of the passage, means'inthe containers defining passages forv delivering oil to the guide, and means on one container defining an inlet opening to receive oil from the conduit in different operative positions of the crosshead.

4. In apparatus of the character described, a

casing, a crosshead in the casing, a guide for thecrosshead, a pin in the crosshead having a passage for oil; a stationary oil-conveyingv conduit in the casing, containers on the opposite sides' so I 

